Outdoor cables mainly use PE (Polyethylene) —typically MDPE or HDPE. PE advantages: Excellent UV resistance, moisture resistance, chemical stability, and overall durability. Usually black, with carbon black additives for maximum sunlight protection. Do I Need to Use Condit for All Fiber Optic Cable Installations? The necessity of using cable depends on the installation environment. While indoor installations may not require conduit in some cases, outdoor, underground, underwater, or aerial installations almost always do. Advantages of Rigid Conduits: Durability: Rigid conduits can withstand physical damage from crushing, impact, and abrasion. Secure Protection:. Choosing the right fiber cable is rarely just about fiber type or connector — the jacket material, fire/installation rating and outdoor-proofing determine whether a link survives a year or a decade. Customers demand low signal latency and low attenuation for their optical communication services. What fiber count should I choose for my outdoor fiber application? The fiber count you deploy on day one depends on the number of connections you need to make or will expect to make in the future. It is always recommended to install the maximum number of fibers in the space you have available, to.